Werner, Ulrich; Hoppe, Hans Wolfgang; Welzel, Peter; Snatzke, Guenther; Boese, Roland:

An approach to bufadienolides from deoxycholic acid. UV, CD, and x-ray data of some 22,23-dihydrobufadienolides.

In: Tetrahedron (Tetrahedron), Jg. 45 (1989) ; Nr. 6, S. 1703-1710
ISSN: 0040-4020
Zeitschriftenaufsatz / Fach: Chemie
The electronic transitions of the various chromophores of 22,23-dihydrobufadienolides I (R1 = H, R2 = H, SMe, SPh; R1 = SMe, SPh, R2 = H) are assigned. The configuration at C-23 of I (R1 = H, R2 = SMe, SPh; R1 = SMe, SPh, R2 = H) was detd. by 1H NMR, CD, and x-ray methods.